test: add coverage for napi_typeof

We had some, but not complete coverage indirectly through
other tests.  Add test to validate it specifically and
covers cases that were not being covered.

PR-URL: https://github.com/nodejs/node/pull/13990
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

test/addons-napi/test_general/test.js

@@ -34,3 +34,19 @@ assert.ok(test_general.testGetPrototype(baseObject) !==
 // test version management functions
 // expected version is currently 1
 assert.strictEqual(test_general.testGetVersion(), 1);
+
+[
+  123,
+  'test string',
+  function() {},
+  new Object(),
+  true,
+  undefined,
+  Symbol()
+].forEach((val) => {
+  assert.strictEqual(test_general.testNapiTypeof(val), typeof val);
+});
+
+// since typeof in js return object need to validate specific case
+// for null
+assert.strictEqual(test_general.testNapiTypeof(null), 'null');

test/addons-napi/test_general/test_general.c

@@ -29,7 +29,7 @@ napi_value testGetVersion(napi_env env, napi_callback_info info) {
   uint32_t version;
   napi_value result;
   NAPI_CALL(env, napi_get_version(env, &version));
-  NAPI_CALL(env ,napi_create_number(env, version, &result));
+  NAPI_CALL(env, napi_create_number(env, version, &result));
   return result;
 }
 
@@ -90,6 +90,35 @@ napi_value testNapiErrorCleanup(napi_env env, napi_callback_info info) {
   return result;
 }
 
+napi_value testNapiTypeof(napi_env env, napi_callback_info info) {
+  size_t argc = 1;
+  napi_value args[1];
+  NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
+
+  napi_valuetype argument_type;
+  NAPI_CALL(env, napi_typeof(env, args[0], &argument_type));
+
+  napi_value result;
+  if (argument_type == napi_number) {
+    NAPI_CALL(env, napi_create_string_utf8(env, "number", -1, &result));
+  } else if (argument_type == napi_string) {
+    NAPI_CALL(env, napi_create_string_utf8(env, "string", -1, &result));
+  } else if (argument_type == napi_function) {
+    NAPI_CALL(env, napi_create_string_utf8(env, "function", -1, &result));
+  } else if (argument_type == napi_object) {
+    NAPI_CALL(env, napi_create_string_utf8(env, "object", -1, &result));
+  } else if (argument_type == napi_boolean) {
+    NAPI_CALL(env, napi_create_string_utf8(env, "boolean", -1, &result));
+  } else if (argument_type == napi_undefined) {
+    NAPI_CALL(env, napi_create_string_utf8(env, "undefined", -1, &result));
+  } else if (argument_type == napi_symbol) {
+    NAPI_CALL(env, napi_create_string_utf8(env, "symbol", -1, &result));
+  } else if (argument_type == napi_null) {
+    NAPI_CALL(env, napi_create_string_utf8(env, "null", -1, &result));
+  }
+  return result;
+}
+
 void Init(napi_env env, napi_value exports, napi_value module, void* priv) {
   napi_property_descriptor descriptors[] = {
     DECLARE_NAPI_PROPERTY("testStrictEquals", testStrictEquals),
@@ -100,6 +129,7 @@ void Init(napi_env env, napi_value exports, napi_value module, void* priv) {
     DECLARE_NAPI_PROPERTY("getNull", getNull),
     DECLARE_NAPI_PROPERTY("createNapiError", createNapiError),
     DECLARE_NAPI_PROPERTY("testNapiErrorCleanup", testNapiErrorCleanup),
+    DECLARE_NAPI_PROPERTY("testNapiTypeof", testNapiTypeof),
   };
 
   NAPI_CALL_RETURN_VOID(env, napi_define_properties(